Thank you for viewing. I am selling this because the size didn't fit. I only tried it on and have disinfected it with alcohol. Product Description: 【NRR33db Noise Reduction】It has an NRR33dB noise reduction effect. However, it is not complete soundproofing, so you can still hear necessary sounds like alarms and calls, allowing you to use it with peace of mind. 【Recommended for those who...】Want to improve sleep quality, want to reduce noise and sleep soundly, want to concentrate on studying or work, want to protect their ears from loud environments like live music, and those with hyperacusis or misophonia. 【2 Sizes x Adjustable Levels + Storage Case Included】Comes with earplugs in 2 sizes (S (black), M (white)). The M size has 3 layers of flanges, and the S size has 2 layers. You can adjust the size by how far you insert them, allowing for a total of 5 levels of size adjustment, so you can find the size that fits your ears. A convenient carrying case is also included for storing the product body cleanly. 【Supervised by a Sleep Consultant】LIXIA earplugs are specifically designed for sleep. Unlike urethane earplugs, they don't completely block the ear, so your ears are less likely to get stuffy even after long periods of use. They use medical-grade silicone, so they fit gently in the ear and are less likely to hurt your ears even when you toss and turn. Also, this product can be washed with water and used repeatedly for cleanliness. Please refrain from purchasing if you are overly concerned about details. No price reduction.